TAILIEUCHUNG - FOURIER ANALYSIS

In this chapter, Fourier analysis will be discussed. Topics covered are Fourier series expansion, Fourier transform, discrete Fourier transform, and fast Fourier transform. Some applications of Fourier analysis, using MATLAB, will also be discussed. | 8 Automated Systems Techniques for On-Line Quality and Production Control in the Manufacture of Textiles Stantcho N. Djiev Technical University of Sofia Luben I. Pavlov Technical University of Sofia Introduction Automation of Basic Textile Processes Automation of Spinning Automated Systems in Weaving Automated Systems in Finishing Distributed Systems for On-Line Quality and Production Control in Textiles Basic Concepts for On-line Control in Textiles Approaches to Building Cost Effective Real-Time Control Systems in Textiles Software Realization Integrating Control and Manufacturing Systems in Textiles Summary Introduction Textile manufacturing involves a variety of sequential and parallel processes of continuous and discrete nature. Each requires precise on-line control of preset technological parameters such as speed pressure temperature humidity and irregularity. On the manufacturing sites these processes take place within separate machines or production lines where a relatively large number of operating personnel and workers are engaged. The intensities of the material flows raw materials fibers yarn and sliver dyes chemicals ready production etc. are substantially high and this leads to heavy transport operations inevitably involving costly hand labor. The raw materials processed in textile possess poor physical and mechanical properties concerning tensile strength homogeneity and others. This causes frequent stops in the technological process due to thread breaks engorgement winding of the material around rollers etc. As a result labor-consuming and monotonous hand services are required for the proper operation of each textile machine. Statistics show that due to higher productivity and new technologies the total number of machines at an average textile factory has decreased more than twice in recent decades Baumgarter et al. 1989 . Nevertheless the problem for replacing hand labor in textile manufacturing still remains a challenge in all

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